Hi guys, I am selling rest pcbs of few designs I did. First pcb is for those Greg Koch fans, it is based on the Gristle King, second one is monster Tight Metal or with the few tweeks Tight Rock with added charge pump for 18v operation and last one is Pinnacle with added trimpots on last fets and also you can use smd fets.G.King is 11$T.Metal/Rock 12$Pinhacle 11$